CN111042213A - Construction method for replacing raft split heads with anti-floating anchor rods for supporting - Google Patents
Construction method for replacing raft split heads with anti-floating anchor rods for supporting Download PDFInfo
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- CN111042213A CN111042213A CN201911383858.XA CN201911383858A CN111042213A CN 111042213 A CN111042213 A CN 111042213A CN 201911383858 A CN201911383858 A CN 201911383858A CN 111042213 A CN111042213 A CN 111042213A
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- floating anchor
- anchor rod
- raft
- steel bars
- cushion layer
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Foundations (AREA)
Abstract
An anti-floating anchor rod replaces a raft split heads rib support construction method, which belongs to the technical field of raft construction. The method is characterized in that: the method comprises the following steps of 1) forming a hole on a foundation cushion layer and an anti-floating anchor rod, and placing the anti-floating anchor rod in the hole; 2) grouting an anti-floating anchor rod and repairing a cushion layer; 3) constructing a waterproof additional layer of the anti-floating anchor rod; 4) bending the anti-floating anchor rod to form a split heads rib; 5) and (3) binding reinforcing steel bars of the raft, constructing binding of reinforcing steel bars at the bottom of the raft according to the arrangement intervals, erecting upper reinforcing steel bars at the top of the anti-floating anchor rods, and binding or welding and fixing the reinforcing steel bars of the anti-floating anchor rods and the upper reinforcing steel bars of the raft. According to the invention, the foundation bed is drilled, the anti-floating anchor rods are arranged in the holes, the anti-floating anchor rods are bent according to the calculated elevation, the horizontal steel bars are not in a straight line after bending, the bending sections of the anti-floating anchor rods are used as split heads, the foundation upper skin steel bars are bound, and finally the anti-floating anchor rods and the raft are connected into a whole, so that the structure can effectively resist the buoyancy of underground water.
Description
Technical Field
An anti-floating anchor rod replaces a raft split heads rib support construction method, which belongs to the technical field of raft construction.
Background
In recent years, along with the increasing development of national economy, city construction is implemented on a large scale, anti-floating anchor rods are used in underground engineering in a large number, how to reasonably and effectively carry out anti-floating anchor rod construction and design is achieved, anti-floating anchor rod construction and raft board construction are organically combined, resource waste is reduced, the construction period is shortened, the construction period is the most important of the underground foundation construction stage, and the working procedures are reduced while the resources and the construction period are effectively saved, so that the problem to be solved is urgently solved at present.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the anti-floating anchor rod supporting construction method organically combines anti-floating anchor rod construction and raft construction, reduces resource waste and saves construction period by replacing raft split heads with the anti-floating anchor rods is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: anti-floating anchor rod replaces raft horse stool muscle to support construction method, its characterized in that: comprises the following steps of (a) carrying out,
1) forming holes in the foundation cushion layer and the anti-floating anchor rods, manually cleaning the foundation cushion layer, after the concrete of the cushion layer reaches the strength, forming holes in the foundation cushion layer according to the arrangement pattern of the anti-floating anchor rods, and placing the anti-floating anchor rods in the holes;
2) grouting an anti-floating anchor rod, repairing a cushion layer, grouting in a hole after the anti-floating anchor rod is installed, and repairing a damaged cushion layer part around the hole;
3) constructing a waterproof additional layer of the anti-floating anchor rod, and paving a waterproof layer on the foundation cushion layer fixed with the anti-floating anchor rod;
4) bending the anti-floating anchor rod to form a split heads rib, determining the top elevation of the bent steel bar of the anti-floating anchor rod, and bending the upper part of the steel bar of the anti-floating anchor rod by adopting a tool matched with an electric hoist until the steel bar at the upper part of the anti-floating anchor rod is bent to form horizontal steel bars radially arranged towards the periphery;
5) and (3) binding reinforcing steel bars of the raft, constructing binding of reinforcing steel bars at the bottom of the raft according to the arrangement intervals, erecting upper reinforcing steel bars at the top of the anti-floating anchor rods, and binding or welding and fixing the reinforcing steel bars of the anti-floating anchor rods and the upper reinforcing steel bars of the raft.
The invention drills holes on the foundation cushion layer, and installs anti-floating anchor rods in the holes, preferably, the length of the anchor rods is not less than 15m (the anchor rods are anchored in clay silty clay on the bottom 5 layers and not less than 10 m); the specific rock stratum is determined by a surveying unit according to the on-site drilling condition; bending the anti-floating anchor rod according to the calculated elevation, wherein the horizontal steel bars are not on the same straight line after bending, the bending section of the anti-floating anchor rod is used as a split heads, binding of foundation upper skin steel bars is started, and finally the anti-floating anchor rod and a raft are connected into a whole, so that the structure can effectively resist the buoyancy of underground water. Compared with the traditional raft horse stool support, the raft horse stool support has the advantages that special blanking is not needed, the manufacturing is simple, the construction speed is greatly improved, and the construction period is shortened. In the traditional method, the raft needs to be additionally provided with the split heads, and the anti-floating anchor rod steel bars are used for replacing the split heads, so that the split heads steel bars and labor cost are saved, and the construction cost is reduced. The construction method of the invention saves a large amount of raft split heads reinforcing steel bars, fully embodies the material-saving requirement, and simultaneously reduces the noise pollution and the waste of reinforcing steel bar garbage generated during the manufacturing of the split heads reinforcing steel bars. The construction method of the invention optimizes the construction process, facilitates the binding of the anti-floating anchor rods and the raft steel bars, greatly accelerates the binding of the raft steel bars and shortens the construction period in the underground stage.
And 4) the tool comprises a section of straight steel pipe and a triangular support, the straight steel pipe is vertically arranged and serves as a right-angle side of the triangular support, the other two sides of the triangular support are formed by steel bars with the diameter of 20mm, a fixed pulley is fixedly arranged on the top point of the other right-angle side of the triangular support, one end of a pull rope is connected with the upper portion of the straight steel pipe, and the other end of the pull rope is connected with the traction end portion of the electric hoist after bypassing the fixed pulley.
The waterproof layer in the step 3) comprises a large-area coiled material waterproof layer laid on the foundation cushion layer and a polyurethane waterproof coating coated on the cushion layer around the root part of the anti-floating anchor rod.
The length of the anti-floating anchor rod is more than or equal to 15m, and the depth of the anti-floating anchor rod inserted into the foundation cushion layer is more than or equal to 10 m.
The anti-floating anchor rod steel bar is three-level deformed steel bar with the diameter of 20 mm.
Compared with the prior art, the invention has the beneficial effects that:
1 simple manufacture and high construction speed
Compared with the traditional raft horse stool support, the raft horse stool support has the advantages that special blanking is not needed, the manufacturing is simple, the construction speed is greatly improved, and the construction period is shortened.
2, the cost is reduced
In the traditional method, the raft needs to be additionally provided with the split heads, and the anti-floating anchor rod steel bars are used for replacing the split heads, so that the split heads steel bars and labor cost are saved, and the construction cost is reduced.
3 green environmental protection
The construction method saves a large amount of raft split heads reinforcing steel bars, fully embodies the material-saving requirement, and simultaneously reduces the noise pollution and the waste reinforcing steel bar garbage generated during the manufacturing of the split heads reinforcing steel bars.
4 saving construction period
The construction method optimizes the construction process, facilitates the binding of the anti-floating anchor rods and the raft steel bars, greatly accelerates the binding of the raft steel bars and shortens the construction period in the underground stage.
Drawings
Fig. 1 is a schematic view of the connection relationship of the anti-floating anchor rod after installation.
Fig. 2 is a structural schematic diagram of the anti-floating anchor rod after installation.
Fig. 3 is a schematic sectional view a-a of fig. 2.
Fig. 4 is a schematic diagram of an axonometric view of the anti-floating anchor after installation.
Wherein, 1, raft reinforcing bar 2, anti-floating anchor rod 3, waterproof bottom plate 4, fixed bolster 5, hole.
Detailed Description
Fig. 1 to 4 are preferred embodiments of the present invention, and the present invention will be further described with reference to fig. 1 to 4.
Referring to the attached figures 1-4: the construction method of replacing raft horse stool bar support with anti-floating anchor rods comprises the following steps,
firstly, before construction, replacing a raft steel bar split heads with anti-floating anchor rods to perform early planning, and analyzing whether the quantity, the arrangement interval and the length of anchored raft steel bars in a drawing meet the requirements of the raft split heads or not; and (4) calculating elevation. And calculating the elevation of the anti-floating anchor rod after bending. Then the following steps are carried out,
1) forming holes in the foundation cushion layer and the anti-floating anchor rods, manually cleaning the foundation cushion layer, after the concrete of the cushion layer reaches the strength, forming holes in the foundation cushion layer according to the arrangement pattern of the anti-floating anchor rods, and placing the anti-floating anchor rods in the holes; drilling by using a down-the-hole drill, wherein the length La of the anchor rod is not less than 15m (the anchor rod is anchored in clay silty clay on the bottom 5 layers and is not less than 10 m); the specific rock stratum is determined by a surveying unit according to the on-site drilling condition; bending the anti-floating anchor rod according to the calculated elevation, wherein the horizontal steel bars are not on the same straight line after bending, the bending section of the anti-floating anchor rod is used as a split heads, binding of foundation upper skin steel bars is started, and finally the anti-floating anchor rod and a raft are connected into a whole, so that the structure can effectively resist the buoyancy of underground water.
2) Grouting the anti-floating anchor rod, repairing a cushion layer, grouting the hole after the anti-floating anchor rod is installed, and repairing the damaged cushion layer part around the hole.
3) And (5) constructing a waterproof additional layer of the anti-floating anchor rod, and paving a waterproof layer on the foundation cushion layer on which the anti-floating anchor rod is fixed.
4) Bending the anti-floating anchor rod to form a split heads rib, determining the top elevation of the bent steel bar of the anti-floating anchor rod, and bending the upper part of the steel bar of the anti-floating anchor rod by adopting a tool matched with an electric hoist until the steel bar at the upper part of the anti-floating anchor rod is bent to form horizontal steel bars radially arranged towards the periphery; and determining the elevation of the bent steel bar top of the anti-floating anchor rod, and bending the anti-floating anchor rod steel bar into 90 degrees by adopting a self-made small tool to be matched with an electric hoist.
5) And (3) binding reinforcing steel bars of the raft, constructing binding of reinforcing steel bars at the bottom of the raft according to the arrangement intervals, erecting upper reinforcing steel bars at the top of the anti-floating anchor rods, and binding or welding and fixing the reinforcing steel bars of the anti-floating anchor rods and the upper reinforcing steel bars of the raft.
The tool comprises a section of straight steel pipe and a triangular support, wherein the straight steel pipe is vertically arranged and serves as a right-angle side of the triangular support, the other two sides of the triangular support are formed by steel bars with the diameter of 20mm, a fixed pulley is fixedly arranged on the top point of the other right-angle side of the triangular support, one end of a pull rope is connected with the upper portion of the straight steel pipe, and the other end of the pull rope is connected with the traction end portion of the electric hoist after bypassing the fixed pulley.
The waterproof layer comprises a large-area coiled material waterproof layer laid on the foundation cushion layer and a polyurethane waterproof coating coated on the cushion layer around the root part of the anti-floating anchor rod. The length of the anti-floating anchor rod is more than or equal to 15m, and the depth of the anti-floating anchor rod inserted into the foundation cushion layer is more than or equal to 10 m. The anti-floating anchor rod steel bar is three-level deformed steel bar with the diameter of 20 mm. Can completely replace the split heads made of steel bars with the diameter of 15mm in the prior art. The bending height of the anti-floating anchor rods meets the supporting height of the raft split heads; after the anti-floating anchor rod is bent, the bent part needs to be kept horizontal, and the longitudinal part is kept vertical; any two sides of the anti-floating anchor rod are not allowed to be on the same straight line after being bent; the raft plate steel bars and the anchor rod steel bars are firmly fixed.
The construction method is suitable for anti-floating construction of structures or constructions with large building size, deep foundation burial, few building layers and insufficient self weight to resist the buoyancy of underground water.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (5)
1. Anti-floating anchor rod replaces raft horse stool muscle to support construction method, its characterized in that: comprises the following steps of (a) carrying out,
1) forming holes in the foundation cushion layer and the anti-floating anchor rods, manually cleaning the foundation cushion layer, after the concrete of the cushion layer reaches the strength, forming holes in the foundation cushion layer according to the arrangement pattern of the anti-floating anchor rods, and placing the anti-floating anchor rods in the holes;
2) grouting an anti-floating anchor rod, repairing a cushion layer, grouting in a hole after the anti-floating anchor rod is installed, and repairing a damaged cushion layer part around the hole;
3) constructing a waterproof additional layer of the anti-floating anchor rod, and paving a waterproof layer on the foundation cushion layer fixed with the anti-floating anchor rod;
4) bending the anti-floating anchor rod to form a split heads rib, determining the top elevation of the bent steel bar of the anti-floating anchor rod, and bending the upper part of the steel bar of the anti-floating anchor rod by adopting a tool matched with an electric hoist until the steel bar at the upper part of the anti-floating anchor rod is bent to form horizontal steel bars radially arranged towards the periphery;
5) and (3) binding reinforcing steel bars of the raft, constructing binding of reinforcing steel bars at the bottom of the raft according to the arrangement intervals, erecting upper reinforcing steel bars at the top of the anti-floating anchor rods, and binding or welding and fixing the reinforcing steel bars of the anti-floating anchor rods and the upper reinforcing steel bars of the raft.
2. The anti-floating anchor rod construction method for replacing raft horse stool rib support according to claim 1, characterized in that: and 4) the tool comprises a section of straight steel pipe and a triangular support, the straight steel pipe is vertically arranged and serves as a right-angle side of the triangular support, the other two sides of the triangular support are formed by steel bars with the diameter of 20mm, a fixed pulley is fixedly arranged on the top point of the other right-angle side of the triangular support, one end of a pull rope is connected with the upper portion of the straight steel pipe, and the other end of the pull rope is connected with the traction end portion of the electric hoist after bypassing the fixed pulley.
3. The anti-floating anchor rod construction method for replacing raft horse stool rib support according to claim 1, characterized in that: the waterproof layer in the step 3) comprises a large-area coiled material waterproof layer laid on the foundation cushion layer and a polyurethane waterproof coating coated on the cushion layer around the root part of the anti-floating anchor rod.
4. The anti-floating anchor rod construction method for replacing raft horse stool rib support according to claim 1, characterized in that: the length of the anti-floating anchor rod is more than or equal to 15m, and the depth of the anti-floating anchor rod inserted into the foundation cushion layer is more than or equal to 10 m.
5. The anti-floating anchor rod construction method for replacing raft horse stool rib support according to claim 1, characterized in that: the anti-floating anchor rod steel bar is three-level deformed steel bar with the diameter of 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911383858.XA CN111042213A (en) | 2019-12-28 | 2019-12-28 | Construction method for replacing raft split heads with anti-floating anchor rods for supporting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911383858.XA CN111042213A (en) | 2019-12-28 | 2019-12-28 | Construction method for replacing raft split heads with anti-floating anchor rods for supporting |
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| CN111042213A true CN111042213A (en) | 2020-04-21 |
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| CN201911383858.XA Pending CN111042213A (en) | 2019-12-28 | 2019-12-28 | Construction method for replacing raft split heads with anti-floating anchor rods for supporting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991223A (en) * | 2022-06-28 | 2022-09-02 | 青岛理工大学 | Waterproof uplift pile and construction method |
| CN115094936A (en) * | 2022-07-13 | 2022-09-23 | 中建一局集团第一建筑有限公司 | Anti-floating reinforcing device for elevator shaft and water collecting shaft hoisting die and construction method |
| CN115182339A (en) * | 2022-08-19 | 2022-10-14 | 中国建筑第八工程局有限公司 | Construction method for anti-floating anchor rod by grouting first and then bending |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06212646A (en) * | 1993-01-18 | 1994-08-02 | Taisei Corp | Preventing method for structure from floating up by use of exisiting pile |
| CN102535525A (en) * | 2011-11-29 | 2012-07-04 | 中国建筑第八工程局有限公司 | Structure and method utilizing anti-floating anchor rods to support underground raft plates |
| CN104131560A (en) * | 2013-10-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Anti-floating anchor and construction method thereof |
| CN209816936U (en) * | 2019-03-18 | 2019-12-20 | 广西建工集团建筑工程总承包有限公司 | Utilize anti-floating anchor rod to support basic gluten structure |
-
2019
- 2019-12-28 CN CN201911383858.XA patent/CN111042213A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06212646A (en) * | 1993-01-18 | 1994-08-02 | Taisei Corp | Preventing method for structure from floating up by use of exisiting pile |
| CN102535525A (en) * | 2011-11-29 | 2012-07-04 | 中国建筑第八工程局有限公司 | Structure and method utilizing anti-floating anchor rods to support underground raft plates |
| CN104131560A (en) * | 2013-10-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Anti-floating anchor and construction method thereof |
| CN209816936U (en) * | 2019-03-18 | 2019-12-20 | 广西建工集团建筑工程总承包有限公司 | Utilize anti-floating anchor rod to support basic gluten structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991223A (en) * | 2022-06-28 | 2022-09-02 | 青岛理工大学 | Waterproof uplift pile and construction method |
| CN115094936A (en) * | 2022-07-13 | 2022-09-23 | 中建一局集团第一建筑有限公司 | Anti-floating reinforcing device for elevator shaft and water collecting shaft hoisting die and construction method |
| CN115182339A (en) * | 2022-08-19 | 2022-10-14 | 中国建筑第八工程局有限公司 | Construction method for anti-floating anchor rod by grouting first and then bending |
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Application publication date: 20200421 |
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